package com.kuang;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFFormulaEvaluator;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.joda.time.DateTime;
import org.junit.Test;

import java.io.FileInputStream;
import java.util.Date;

public class ExcelReadTest {

    String PATH = "ExcelCreate\\";

    @Test
    public void testRead03() throws Exception {
        //获取文件流
        FileInputStream fis = new FileInputStream(PATH + "03版本测试.xls");
        //1、创建一个工作簿。使用 exceL能操作的这边他都可以操作！
        Workbook workbook = new HSSFWorkbook(fis);
        //2、得到表
        Sheet sheet = workbook.getSheetAt(0);
        //3、得到行
        Row row = sheet.getRow(0);
        //4、得到列
        Cell cell = row.getCell(1);

        //读取值的时候，一定要注意类型！
        //getStringCellValue 字符串类型
        System.out.println(cell.getNumericCellValue());
        fis.close();
    }

    @Test
    public void testRead07() throws Exception {
        //获取文件流
        FileInputStream fis = new FileInputStream(PATH + "07版本测试.xlsx");
        //1、创建一个工作簿。使用 exceL能操作的这边他都可以操作！
        Workbook workbook = new XSSFWorkbook(fis);
        //2、得到表
        Sheet sheet = workbook.getSheetAt(0);
        //3、得到行
        Row row = sheet.getRow(0);
        //4、得到列
        Cell cell = row.getCell(0);

        //读取值的时候，一定要注意类型！
        //getStringCellValue 字符串类型
        System.out.println(cell.getStringCellValue());
        fis.close();
    }

    @Test
    public void testCellType() throws Exception {

        //获取文件流
        FileInputStream fis = new FileInputStream(PATH + "课题信息表20190701.xlsx");

        //创建一个工作簿。使用 excel能操作的这边他都可以操作
        Workbook workbook = new XSSFWorkbook(fis);
        Sheet sheet = workbook.getSheetAt(0);

        //获取标题内容
        Row rowTitle = sheet.getRow(0);
        if (rowTitle != null) {
            //得到一行有多少列有数据
            int cellCount = rowTitle.getPhysicalNumberOfCells();
            for (int cellNum = 0; cellNum < cellCount; cellNum++) {
                Cell cell = rowTitle.getCell(cellNum);
                if (cell != null) {
                    int cellType = cell.getCellType();
                    String cellValue = cell.getStringCellValue();
                    System.out.print(cellValue + "|");
                }
            }
            System.out.println();
        }

        //获取表中的内容
        //获取表中有多少行有数据
        int rowCount = sheet.getPhysicalNumberOfRows();
        for (int rowNum = 1; rowNum < rowCount; rowNum++) {
            Row rowData = sheet.getRow(rowNum);
            if (rowData != null) {
                //读取列
                int cellCount = rowTitle.getPhysicalNumberOfCells();
                for (int cellNum = 0; cellNum < cellCount; cellNum++) {
                    System.out.println("[" + (rowNum + 1) + "-" + (cellNum + 1) + "]");

                    Cell cell = rowData.getCell(cellNum);
                    //匹配列的数据类型
                    if (cell != null) {
                        int cellType = cell.getCellType();
                        String cellValue = "";

                        switch (cellType) {
                            case HSSFCell.CELL_TYPE_STRING://字符
                                System.out.print("【 String】");
                                cellValue = cell.getStringCellValue();
                                break;
                            case HSSFCell.CELL_TYPE_BOOLEAN://布尔
                                System.out.print("【 BOOLEAN】");
                                cellValue = String.valueOf(cell.getBooleanCellValue());
                                break;
                            case HSSFCell.CELL_TYPE_BLANK://空
                                System.out.print("【 BLANK】");
                                break;
                            case HSSFCell.CELL_TYPE_NUMERIC://数字(日期、普通数字)
                                System.out.print("【 NUMERIC】");
                                if (HSSFDateUtil.isCellDateFormatted(cell)) {// 日期
                                    System.out.print("--【日期】");
                                    Date date = cell.getDateCellValue();
                                    cellValue = new DateTime(date).toString("yyyy-MM-dd");
                                } else {
                                    //不是日期格式，防止数字过长！
                                    System.out.print("--【转换为字符串输出】");
                                    cell.setCellType(HSSFCell.CELL_TYPE_STRING);
                                    cellValue = cell.toString();
                                }
                                break;
                            case HSSFCell.CELL_TYPE_ERROR://错误
                                System.out.print("【 数据类型错误】");
                                break;
                        }
                        System.out.println(cellValue);
                    }
                }
            }
        }
        //关闭流
        fis.close();
    }

    @Test
    public void testFormula() throws Exception {
        FileInputStream fis = new FileInputStream(PATH+"公式.xls");
        //创建一个工作簿。使用 excel能操作的这边他都可以操作
        Workbook workbook = new HSSFWorkbook(fis);
        Sheet sheet = workbook.getSheetAt(0);

        Row row = sheet.getRow(4);
        Cell cell = row.getCell(0);

        //拿到计算公司 evaL
        FormulaEvaluator FormulaEvaluator = new HSSFFormulaEvaluator((HSSFWorkbook) workbook);

        //输出单元格的内容
        int cellType = cell.getCellType();
        switch (cellType) {
            case Cell.CELL_TYPE_FORMULA://公式
                String formula = cell.getCellFormula();
                System.out.println(formula);

                //计算
                CellValue evaluate = FormulaEvaluator.evaluate(cell);
                String cellValue = evaluate.formatAsString();
                System.out.println(cellValue);
                break;
        }
    }


}
